# Each with arguments **URL:** \ **Category:** Ruby\ **Created:** [May 11, 2006, 4:57pm UTC](https://www.ruby-forum.com/t/each-with-arguments/60249 "2006-05-11T16:57:20Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![cmcfab](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/838e76/32.png) [@cmcfab](https://www.ruby-forum.com/u/cmcfab)\ **Post date:** [May 11, 2006, 4:57pm UTC](https://www.ruby-forum.com/t/each-with-arguments/60249/1 "2006-05-11T16:57:20Z")
I’ve found myself writing the following code to address needs I have processing formatted text files, but is this possible some other and I am going through foolish gyrations here… Here is the code: class Array alias :orig\_each :each def each(cnt = 1, &blk) if cnt == 1 orig\_each { |x| blk.call(x) } else 0.step(self.size - 1,cnt) do |i| yield(self.slice(i,cnt)) end end end end so I can do things like this arr = [key, value, value, key, value, value, key, value, value, …] arr.each(3) do |key,val1,val2| #manipulate them as I see fit end Thanks for any help you can give! Charles C. Account Executive Datatek, Inc. 800 536-4835 ext. 145 1 919 425-3145 (international) removed\_email\_address@domain.invalid ---
**Author:** ![cmcfab](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/838e76/32.png) [@cmcfab](https://www.ruby-forum.com/u/cmcfab)\ **Post date:** [May 11, 2006, 5:06pm UTC](https://www.ruby-forum.com/t/each-with-arguments/60249/2 "2006-05-11T17:06:49Z")
On 11-May-06, at 10:53 AM, Charles C. wrote: > ``` > orig_each { |x| blk.call(x) } > > ``` > > arr = [key, value, value, key, value, value, key, value, value, …] > arr.each(3) do |key,val1,val2| > #manipulate them as I see fit > end > > Thanks for any help you can give! Have you looked at Enumerable#each\_slice which is included in Array? ## ratdog:~ mike$ ri Enumerable#each\_slice -------------------------------------------------- Enumerable#each\_slice e.each\_slice(n) {…} ``` Iterates the given block for each slice of elements. e.g.: (1..10).each_slice(3) {|a| p a} # outputs below [1, 2, 3] [4, 5, 6] [7, 8, 9] [10] ``` Mike – Mike S. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) [http://www.stok.ca/~mike/](http://www.stok.ca/~mike/) The “`Stok’ disclaimers” apply. ---
**Author:** ![cmcfab](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/838e76/32.png) [@cmcfab](https://www.ruby-forum.com/u/cmcfab)\ **Post date:** [May 11, 2006, 5:06pm UTC](https://www.ruby-forum.com/t/each-with-arguments/60249/3 "2006-05-11T17:06:55Z")
On 5/11/06, Charles C. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > ``` > orig_each { |x| blk.call(x) } > > ``` > > arr = [key, value, value, key, value, value, key, value, value, …] > 1 919 425-3145 (international) > removed\_email\_address@domain.invalid require ‘enumerator’ (1…9).to\_enum.each\_slice(3) { |x, y, z| puts “%i %i %i” % [x, y, z] } 1 2 3 4 5 6 7 8 9 -Alder ---
**Author:** ![cmcfab](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/838e76/32.png) [@cmcfab](https://www.ruby-forum.com/u/cmcfab)\ **Post date:** [May 11, 2006, 5:10pm UTC](https://www.ruby-forum.com/t/each-with-arguments/60249/4 "2006-05-11T17:10:28Z")
Mike S. wrote: > > ``` > > alias :orig_each :each > > > > ``` > > ``` > [1, 2, 3] > [4, 5, 6] > [7, 8, 9] > [10] > > ``` > > Mike exacly what I was looking for. I had checked the ruby docs, but only looked under Array… ☹ Sorry for the apparently stupid question. Thanks, Charles C. Account Executive Datatek, Inc. 800 536-4835 ext. 145 1 919 425-3145 (international) removed\_email\_address@domain.invalid ---
**Author:** ![cmcfab](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/838e76/32.png) [@cmcfab](https://www.ruby-forum.com/u/cmcfab)\ **Post date:** [May 11, 2006, 5:13pm UTC](https://www.ruby-forum.com/t/each-with-arguments/60249/5 "2006-05-11T17:13:37Z")
On 5/11/06, Mike S. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > ``` > > alias :orig_each :each > > > > ``` > > ``` > [1, 2, 3] > > ``` > > The “`Stok’ disclaimers” apply. each\_slice doesn’t wfm if I don’t require ‘enumerator’ first: irb(main):001:0\> (1…10).each\_slice(3) {|a| p a} (1…10).each\_slice(3) {|a| p a} NoMethodError: undefined method `each\_slice’ for 1…10:Range from (irb):1 irb(main):002:0\> require ‘enumerator’ require ‘enumerator’ true irb(main):003:0\> (1…10).each\_slice(3) {|a| p a} (1…10).each\_slice(3) {|a| p a} [1, 2, 3] [4, 5, 6] [7, 8, 9] [10] nil ---
**Author:** ![cmcfab](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/838e76/32.png) [@cmcfab](https://www.ruby-forum.com/u/cmcfab)\ **Post date:** [May 11, 2006, 5:35pm UTC](https://www.ruby-forum.com/t/each-with-arguments/60249/6 "2006-05-11T17:35:50Z")
You can as well use direct assignment, say if you want just every third element you can do: 17:32:15 [~]: ruby -r enumerator -e ‘(1…10).each\_slice(3) {|a,| p a}’ 1 4 7 10 Kind regards robert ---
**Author:** ![cmcfab](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/838e76/32.png) [@cmcfab](https://www.ruby-forum.com/u/cmcfab)\ **Post date:** [May 11, 2006, 6:36pm UTC](https://www.ruby-forum.com/t/each-with-arguments/60249/7 "2006-05-11T18:36:15Z")
On 5/11/06, Robert K. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > robert cool, didn’t know about that one! -Alder ---
**Author:** ![cmcfab](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/838e76/32.png) [@cmcfab](https://www.ruby-forum.com/u/cmcfab)\ **Post date:** [May 11, 2006, 5:20pm UTC](https://www.ruby-forum.com/t/each-with-arguments/60249/8 "2006-05-11T17:20:27Z")
On 11-May-06, at 11:09 AM, Charles C. wrote: > exacly what I was looking for. I had checked the ruby docs, but only > looked under Array… ☹ > > Sorry for the apparently stupid question. Of course it would help if the answer was correct - see Alder G.'s response. I should have tried it before posting! Mike – Mike S. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) [http://www.stok.ca/~mike/](http://www.stok.ca/~mike/) The “`Stok’ disclaimers” apply.